Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 0), (-1, -1, 1), (-1, 0, -1), (1, 1, 0)}.
A148524
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 0), (-1, -1, 1), (-1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =19a(5) =39a(6) =155a(7) =349a(8) =1451a(9) =3479a(10) =14779a(11) =36915a(12) =159715a(13) =411423a(14) =1802107a(15) =4751245a(16) =21023355a(17) =56465431a(18) =251821403a(19) =686573131a(20) =3082102019a(21) =8508596927a(22) =38404325915a(23) =107140788035a(24) =485841061747
External references
- oeis: A148524